Invasive SpeciesJapanese knotweed

Fallopia japonica
FOUND by Mrs. J.
Limestone, ME
ID Confirmed
Quality checked by Mrs. J. and Pat and Caroline
Peer reviewed by
Field Notes
It was a hot and sweaty, but beautiful day. We drove to a spot adjacent to a field and Route 89. We found a thicket of our suspected plant, the Giant Knotweed. When we first arrived we heard the buzzing of grasshoppers or crickets or other insects nearby. A few cars passed us by along the road. There was a slight floral scent in the air, like fresh cloves or mint? We were surprised at how tall the plants were on the site. We were also surprised at the size of the plot, it was approximately 45m x 25m. We noticed that the plants created a dense canopy, with a mess of dead crisscrossed branches underneath. We wondered which type of organisms could use this habitat potentially for food or shelter? Japanese Knotweed was found later, a short distance away near Noyes Road and Wade Road in Limestone: 46.877640 N, -67.854480 W.
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Michelle and I had the opportunity to visit a second site nearby. This one was on Noyes Road in Limestone. The site was adjacent to the road and farmland like our first investigation. We noticed right away that the site was smaller in size, approximately 23m x 9.5m. As you can see here the leaves of this plant are spade shaped and much smaller in size than Giant Knotweed, these leaves are about the size of the palm of a hand.
Photo of my evidence.
The stems are the color of rhubarb, a dull red/cranberry wood color. This coloring is a distinctive difference from the Giant Knotweed.
Photo of my evidence.
The foliage is dense here but not nearly as tall as we found on the other site. The size alone of the plant height and the leaf size, lead us to believe that we found Japanese Knotweed.
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Fallopia japonica
Common name:
Japanese knotweed
Sampling method: 
Just looking around
Photo of our sampling method.
Place Studied
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Map this species
N 46.914152 °
W -67.861395 °
Observation Site Information
A photo of our study site.
Upland - Field
Trip Information
Corner of Land Cote Road and Route 89
Trip date: 
Wed, 2015-08-05 14:07
Town or city: 
Limestone, ME
Type of investigation: 
Species Survey


Hi Mrs. J., your sampling method photo has been updated!